Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(572)

Unified Diff: cc/animation/timing_function.cc

Issue 140253013: Define accelerated steps time function. Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: git cl upload Created 6 years, 10 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
Index: cc/animation/timing_function.cc
diff --git a/cc/animation/timing_function.cc b/cc/animation/timing_function.cc
index 7fdb37fed962a48fa68a3e9b58252b694c50f4ca..3c6d4eb8cd3ffbd384d6a97a2c5a78e85d5f489d 100644
--- a/cc/animation/timing_function.cc
+++ b/cc/animation/timing_function.cc
@@ -162,4 +162,29 @@ scoped_ptr<TimingFunction> EaseInOutTimingFunction::Create() {
0.42, 0.0, 0.58, 1).PassAs<TimingFunction>();
}
+scoped_ptr<StepsTimingFunction> StepsTimingFunction::Create(
+ int steps, bool stepsAtStart) {
+ return make_scoped_ptr(new StepsTimingFunction(steps, stepsAtStart));
+}
+
+StepsTimingFunction::StepsTimingFunction(int steps,
+ bool stepsAtStart)
+ : steps_(steps), stepsAtStart_(stepsAtStart) {}
+
+StepsTimingFunction::~StepsTimingFunction() {}
+
+float StepsTimingFunction::GetValue(double x) const {
+ return std::min(1.0, (floor(steps_ * x) + stepsAtStart_) / steps_);
+}
+
+scoped_ptr<AnimationCurve> StepsTimingFunction::Clone() const {
+ return make_scoped_ptr(
+ new StepsTimingFunction(*this)).PassAs<AnimationCurve>();
+}
+
+void StepsTimingFunction::Range(float* min, float* max) const {
+ *min = static_cast<float>(stepsAtStart_) / static_cast<float>(steps_);
+ *max = 1.0;
+}
+
} // namespace cc

Powered by Google App Engine
This is Rietveld 408576698